Phylogeography of Schizothorax o’connori (Cyprinidae: Schizothoracinae) in the Yarlung Tsangpo River, Tibet

He, Dekui; Chen, Yifeng

doi:10.1007/s10750-009-9918-2

Cited by 23 publications

(35 citation statements)

References 31 publications

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“…In the current study, the overall haplotype and nucleotide diversities were much lower in S. nukiangensis compared with S. prenanti , S. o'connori , Platypharodon extremus, and Gymnocypris chilianensis (He and Chen ; Liang et al. ; Zhao et al.…”

Section: Discussionmentioning

confidence: 54%

Genetic structure and historical demography of Schizothorax nukiangensis (Cyprinidae) in continuous habitat

Chen

2015

Ecology and Evolution

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Geographic distance, different living habitats or Pleistocene climatic oscillations have frequently been found to shape population genetic structure in many species. The genetic structure of Schizothorax nukiangensis, a high altitude, valuable fish species, which is distributed throughout the Nujiang River, was investigated by mitochondrial DNA sequence analysis. The cytochrome c oxidase subunit I (COI), cytochrome b (cytb), and the mitochondrial control region (MCR) of S. nukiangensis were concatenated for examination of population structure and demographic history. The concatenated data set (2405 bp) implied a pronounced genetic population structure (overall FST = 0.149) and defined two population units. Strong differentiation was detected between the Sanjiangkou (SJK) population and other populations due to environmental heterogeneity, dispersal ability, and/or glacial cycles. Additional DNA sequencing of the nuclear RAG2 gene also examined significant differentiation between two units and between SJK and the upstream populations (U-unit). Recent expansion events suggest that S. nukiangensis may have undergone a rapid increase during warm interglacial periods. Surprisingly, S. nukiangensis appears to have undergone an obvious expansion during the last glaciations (LG) for cold hardiness and a sharp contraction from 1.5 ka to the present. However, two population units exhibited different reflections during the LG, which might be closely related to their living habitats and cold hardiness. A clear pattern of isolation by distance was detected in S. nukiangensis due to feeding habits, limited dispersal ability, and/or philopatry. It is vitally important that more attention be given to S. nukiangensis due to low genetic diversity, lack of gene flow, and recent population contraction.

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Section: Discussionmentioning

confidence: 54%

Genetic structure and historical demography of Schizothorax nukiangensis (Cyprinidae) in continuous habitat

Chen

2015

Ecology and Evolution

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“…For example, two species, S. prennati and R. luxiensis, showed an upstream migration prior to spawning from May to August, and this was confirmed by their presence at all sampling sites only in June and August. Upstream migration of species genus Schizothorax usually occurred in April to May, while their downstream migration occurred in September to October (He & Chen, 2009). Another possible reason for temporal variability in fish assemblages was drastic changes in physical habitat conditions and hydrological factors, such as the velocity, discharge, stream width, and depth between summer and winter, which were caused by the monsoon climate (see discussion ''Materials and methods'' section).…”

Section: Temporal Variation Of Fish Assemblagesmentioning

confidence: 99%

Hydrologic connectivity driven natural stream fish assemblages in mountain streams in the Yangtze River basin: implications for stream fish conservation in monsoonal East Asia

Kang

Tao

et al. 2016

Hydrobiologia

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The East Asian monsoon and related seasonal rain belts are assumed to be significantly variable at intraseasonal, interannual, and interdecadal time scales, and largely determine the hydrology and ecological processes of the streams and rivers in this region. This study investigated the spatiotemporal variation in fish assemblages and the relative importance of local habitat and regional landscape variables in two protected streams in the middle Yangtze River basin. We hypothesized that the stream fish assemblages in this area are strongly influenced by the monsoon climate, and display a spatiotemporal variation in response to changes of stream flow regimes and physical habitats. The results show that species richness and abundance varied with both season and stream size. The distance to the downstream confluence site was the top important environmental factor, followed by altitude and downstream link. The results suggest that the fish assemblages within this protected watershed are mainly affected by regional landscape variables such as longitudinal position and stream position, but less by local habitat variables including water temperature and habitat types. The study highlights the importance of tributary connectivity and continuity to stream fish diversity in this area, indicating that restoration activities should preferentially recover the connectivity between upstream and downstream.Handling editor: M. Power

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“…Geologic changes and climatic instabilities are important factors that influence the evolutionary history of many taxa. Geologic changes have frequently shape the genetic structure of many species in East Asia [ 10 – 14 ], including fish species [ 13 , 15 ]. For example, the uplift of the Qinghai–Tibetan Plateau [ 16 , 17 ] has been reported to drive speciation and population diversification in a number of East Asian fish species [ 3 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Phylogeographic structure, cryptic speciation and demographic history of the sharpbelly (Hemiculter leucisculus), a freshwater habitat generalist from southern China

et al. 2017

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BackgroundSpecies with broad distributions frequently divide into multiple genetic forms and may therefore be viewed as “cryptic species”. Here, we used the mitochondrial cytochrome b (Cytb) and 12 nuclear DNA loci to investigate phylogeographic structures of the sharpbelly (Hemiculter leucisculus) in rivers in southern China and explored how the geological and climatic factors have shaped the genetic diversity and evolutionary history of this species.ResultsOur mitochondrial phylogenetic analysis identified three major lineages (lineages A, B, and C). Lineages B and C showed a relatively narrower geographic distribution, whereas lineage A was widely distributed in numerous drainages. Divergence dates suggested that H. leucisculus populations diverged between 1.61–2.38 Ma. Bayesian species delimitation analysis using 12 nuclear DNA loci indicated the three lineages probably represented three valid taxa. Isolation-with-migration (IM) analysis found substantial gene flow has occurred among the three lineages. Demographic analyses showed that lineages B and C have experienced rapid demographic expansion at 0.03 Ma and 0.08 Ma, respectively.Conclusions Hemiculter leucisculus populations in drainages in southern China comprise three mtDNA lineages, and each of which may represent a separate species. Intense uplift of the Qinghai–Tibetan Plateau, evolution of Asian monsoons, changes in paleo-drainages, and poor dispersal ability may have driven the divergence of the three putative species. However, gene flow occurs among the three lineages. Climatic fluctuations have a prominent impact on the populations from the lineages B and C, but exerted little influence on the lineage A.Electronic supplementary materialThe online version of this article (10.1186/s12862-017-1058-0) contains supplementary material, which is available to authorized users.

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Phylogeography of Schizothorax o’connori (Cyprinidae: Schizothoracinae) in the Yarlung Tsangpo River, Tibet

Cited by 23 publications

References 31 publications

Genetic structure and historical demography of Schizothorax nukiangensis (Cyprinidae) in continuous habitat

Genetic structure and historical demography of Schizothorax nukiangensis (Cyprinidae) in continuous habitat

Hydrologic connectivity driven natural stream fish assemblages in mountain streams in the Yangtze River basin: implications for stream fish conservation in monsoonal East Asia

Phylogeographic structure, cryptic speciation and demographic history of the sharpbelly (Hemiculter leucisculus), a freshwater habitat generalist from southern China

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